laravel开启sql日志

有时候功能模块编写完成之后，运行速度还是很慢，如果开启了这个日志。那么我们就可以在日志里面查看到每一天执行的sql耗时，可以更加快捷的定位到问题。

具体打开的方法如下：

在app/Providers/EventServiceProvider.php里面增加

        'Illuminate\Database\Events\QueryExecuted' => [
            'App\Listeners\QueryListener',
        ],

在app/Listeners增加QueryListener.php

<?phpnamespace App\Listeners;use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Database\Events\QueryExecuted;
use Monolog\Logger;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Support\Facades\Log;
use Monolog\Handler\RotatingFileHandler;class QueryListener
{
    /**
     * Create the event listener.
     *
     * @return void
     */
    public function __construct()
    {
        //
    }    /**
     * Handle the event.
     *
     * @param  QueryExecuted  $event
     * @return void
     */
    public function handle(QueryExecuted $event)
    {
        try{
            if (env('APP_DEBUG') == true) {
                $this->recordLog($event, 'logs/sql/sql.log');
            }
        }catch (\Exception $exception){
            Log::error('log sql error:'.$exception->getMessage());
        }
    }    protected function recordLog($event, $sqlFile)
    {
        $sql = str_replace("?", "'%s'", $event->sql);
        foreach ($event->bindings as $i => $binding) {
            if ($binding instanceof \DateTime) {
                $event->bindings[$i] = $binding->format('\'Y-m-d H:i:s\'');
            } else {
                if (is_string($binding)) {
                    $event->bindings[$i] = "'$binding'";
                }
            }
        }
        $log = vsprintf($sql, $event->bindings);
        $log = $log.'  [ RunTime:'.$event->time.'ms ] ';
        (new Logger('sql'))->pushHandler(new RotatingFileHandler(storage_path($sqlFile)))->info($log);
    }
}

打开之后，我们以后的业务执行过的sql都会保存在storage/logs/sql里面